A brief account of the present status of the recent nonlocal generalization of Einstein’s theory of gravitation is presented. The main physical assumptions that underlie this theory are described. We clarify the physical meaning and significance of Weitzenböck’s torsion and emphasize its intimate relationship with the gravitational field, characterized by the Riemannian curvature of spacetime. ...

1 Part II: Introduction General Relativity (16 lectures) 2 1.1 Pre-requisites . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.2 The Schedule . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.3 Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.4 Signature Convention . . . . . . . . . . . . . . . . . . . . . . . . 2 1.5 Curvature Conventions ....

Several authors have claimed that prediction is essentially impossible in the general theory of relativity, the case being particularly strong, it is said, when one fully considers the epistemic predicament of the observer. Each of these claims rests on the support of an underdetermination argument and a particular interpretation of the concept of prediction. I argue that these underdeterminati...

This article wants to be two things. On the one hand it wants to review a number of approaches to the problem of quantum gravity that are new and have not been widely discussed so far. On the other hand it wants to offer a new look at the problem of quantum gravity. The different approaches can be organized according to how they answer the following questions: Is the concept of a spacetime fund...